Tyrannosaurus rex may have taken far longer to grow up than scientists once thought. By analyzing growth rings in fossilized leg bones from 17 tyrannosaur specimens and using new statistical methods, ...

Newly analyzed dinosaur eggs from China are offering an unusually intimate look at how these animals reproduced, grew, and nested in the final chapters of the Cretaceous. From clutch sites preserved ...

An incredible fossil discovery of two fighting mammoths has been highlighted for the first time in a new book on prehistoric behavior, "Locked in Time: Animal Behavior Unearthed in 50 Extraordinary ...